-When _______ your mother _______ you that blue dress, Mary?-Sorry, I really can't remember.
#36452
A
does; buy
B
has; bought
C
had; bought
D
did; buy
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---Could you tell me when your father___back?---I’m not sure now. but when he ___next week, I’ll tell you.
#41852
A
return, comes
B
will come, returns
C
comes, will return
D
will return, comes
I ____you yesterday afternoon ,but you ____at home .
#37858
A
call ,aren’t
B
am calling ,aren’t
C
called , weren’t
D
calls, weren’t
Great changes        in our city last year.
#40449
A
happen
B
happened
C
take place
D
took place
They have been skating __________.
#40389
A
for three hours
B
since three hours ago
C
three hours ago
D
since three hours